a)5,578; 8,56; 8,375; 7,999; 7,1 5,578;7,1;7,999;8,375;8,56 b)39,23; 27,5; 28,14; 39,123; 26,999 26,999;27,5;28,14;39,123;39,23 Bài 3:Viết các số sau theo thứ tự từ lớn đến bé: a)83,62; 84,26; 82,65; 81,95; 84,29 84,29;84,26;83,62;82,65;81,95 b)6,847; 7,02 6,748; 6,874; 7,2 7,2;7,02;6,874;6,847;6,748 III.Đổi đơn vị đại lượng Bài1 .Đúng Đ sai ghi S Đ a)8m6dm=8,6m S h)3km5dam=3,5km S b)78,9dm=7,89cm Đ i)15,2m=15m 20cm Đ c)4 tấn 562kg=4,562 tấn S k)39 tấn 14 kg>39014 kg S d)25kg 39g<25,39kg S l)3 tạ 5 kg = 35kg S e)2g=2000kg Đ h) 2/5 giờ = 24 phút S f)23cm²=2,3dm² S m)7m ²7cm² >7,007m² Đ g)9m²35dm²=9,35m² S n)25dm²5cm²>2550cm² Bài 2:Điền số thích hợp vào chỗ chấm: 2036kg=2,036 tấn 12m² 5 dm²=12,5m² 3 m² 24dm²=3,24m² 7m 3cm=7,03m 3hm² 2 dam²=3,2hm² 7m 3 cm=70,3dm 2,038 tấn=2038 kg 1/5 hm² 5m²= m² 7 hm² 3dam²=7,3hm² 8m5cm=80,5dm 17 tấn 52 kg=1700,52 yến 5 ha 27 dam²=502700m² 12 tấn 36 kg=120,36 tạ 2 m² 43 dm²=2,43m² Anh chị xem có đúng ko ạ câu 1/5hm²5m²= m² em ko bt làm

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